Description

Pro version of the spectral audio analyser. Selectable bandwidth up to 24 kHz, flexible amplitude and frequency mapping through touch and scroll, different update speeds and colour mappings. Accurate display of high-pitch or even ultrasonic tones, environmental noise or rumble... .

Accurate real-time measurement feature allows detection and analysis of live audio. Spectrograms can be saved as png or jpg files to sd-card.

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Latest Version

4.2

323 total

5 175

4 85

3 32

2 20

1 10

A Google User

Great tool Helped me identify the charger in my room emitting a high pitch electrical whine. The price of the app was reasonable for a good nights sleep :-)

A Google User

'grebe52 using Galaxy S2 Works well with Android 4 on Galaxy GT-19100. I've been working on birdsong, and this application produces a decent and useful image of the analysis of the song, say, of a Blackbird (European), detecting frequencies well-beyond my (ageing) ears. It will also detect Bat echo-location signals. As an retired physicist I find this device incredible, when I recollect the amount of kit such as the CROs, mics, amplifiers, which was needed to do such an analysis years ago. I can sit in the garden and 'watch' the birdsong, with one small smartphone! It has also been useful in looking at the overtones emanating from a Tibetan Singing Bowl, and likewise by Mongolian Throat Singers. The fun is endless! A labelled y-axis would be a refinement. Nevertheless, an excellent application.

What a wonderful program. It does the job and is really fun and educational in so many ways. One thing I would love to see is a better way of configuring the ranges of the y-axis. Please let me enter numbers somewhere. It can be hidden, a real hassle, I wouldn't mind. Just let me enter numbers. The scrolling really doesn't work for me that well. Thanks!

A Google User

Really needs X-axis labels… This app really needs time labels along the X axis. Other than that, I am quite impressed. My background in acoustical analysis would make this of interest to me, but I think even those without such a background would have to find this very cool. I have a memory, from more than a quarter century ago, of being shown a waterfall plot, and hearing the sound that was represented, and having a light go on in my head about the relationship between what I was seeing and what I was hearing. Back then, it took the better part of an hour for a pen plotter to draw the waterfall plot that I was shown. I can imagine people today, watching this app on their phones in realtime, and having the same epiphany that I had back then. About twenty years ago, I wrote a program like this to run on an MS-DOS-based computer, in realtime. Back then, it took a specialized digital signal processor to handle doing the FFTs fast enough to make this possible. Isn't it amazing how far the technology has advanced, since then, that this can now be done in a small, common, handheld device.

A Google User

Don't buy the full app stick with the free one I thought the free app was good. I kicked myself for forking out for the full version. Random signals and differences between devices asked for help was told to calibrate? Sent images of faulty traces but no reply since then. In short for me poor support, over priced app with very little extra for paying full price. Use the free one and stay happy.

A Google User

Cool! Does one thing and does it very well! (Just used it to find the frequency I sing at, and the frequency I whistle at.)

User reviews

A Google User January 24, 2012

Great tool Helped me identify the charger in my room emitting a high pitch electrical whine. The price of the app was reasonable for a good nights sleep :-)

'grebe52 using Galaxy S2 Works well with Android 4 on Galaxy GT-19100. I've been working on birdsong, and this application produces a decent and useful image of the analysis of the song, say, of a Blackbird (European), detecting frequencies well-beyond my (ageing) ears. It will also detect Bat echo-location signals. As an retired physicist I find this device incredible, when I recollect the amount of kit such as the CROs, mics, amplifiers, which was needed to do such an analysis years ago. I can sit in the garden and 'watch' the birdsong, with one small smartphone! It has also been useful in looking at the overtones emanating from a Tibetan Singing Bowl, and likewise by Mongolian Throat Singers. The fun is endless! A labelled y-axis would be a refinement. Nevertheless, an excellent application.

What a wonderful program. It does the job and is really fun and educational in so many ways. One thing I would love to see is a better way of configuring the ranges of the y-axis. Please let me enter numbers somewhere. It can be hidden, a real hassle, I wouldn't mind. Just let me enter numbers. The scrolling really doesn't work for me that well. Thanks!

Really needs X-axis labels… This app really needs time labels along the X axis. Other than that, I am quite impressed. My background in acoustical analysis would make this of interest to me, but I think even those without such a background would have to find this very cool. I have a memory, from more than a quarter century ago, of being shown a waterfall plot, and hearing the sound that was represented, and having a light go on in my head about the relationship between what I was seeing and what I was hearing. Back then, it took the better part of an hour for a pen plotter to draw the waterfall plot that I was shown. I can imagine people today, watching this app on their phones in realtime, and having the same epiphany that I had back then. About twenty years ago, I wrote a program like this to run on an MS-DOS-based computer, in realtime. Back then, it took a specialized digital signal processor to handle doing the FFTs fast enough to make this possible. Isn't it amazing how far the technology has advanced, since then, that this can now be done in a small, common, handheld device.

Don't buy the full app stick with the free one I thought the free app was good. I kicked myself for forking out for the full version. Random signals and differences between devices asked for help was told to calibrate? Sent images of faulty traces but no reply since then. In short for me poor support, over priced app with very little extra for paying full price. Use the free one and stay happy.

Could be useful with some updates 24k causes the audio on Samsung GSIII to fail. It could also benefit from a calibration option, like your frequency analyzer app. Also, a change in orientation option would be great to see a wider view of the frequency range, to help isolate problem frequencies. And saved settings are a must!

Logarithmic scale is off The logarithmic scale feature which I paid good money for is not accurate. Middle C which appears a perfect 262 hz in the linear version appears to be 200hz or so. Also you cannot rescale to limit the plot to a particular octave. I want this app to be able to tell me which notes are being played in a piano chord, but I cannot trust the scaling - please fix this before I up my rating. It would also be a great help if you could rescale in musical notes, so that you can clearly see which notes are being played

The basics are great, range zooming very bad. It kind of works, but in an unpredictable way...you have to randomly mash your finger on the amplitude and frequency scales until something useful hopefully appears. 5 star app with range scaling fixed, particularly with numerical input. FFT works great, very fluid.

Very pretty, but lacks time axis Surely showing the time axis should be optional? It might be fixed by the sampling frequency but that's no use to a third party looking at the data wanting to know the most basic attribute of the data. Not "PRO" until that's added.

Not sure if right The scale on the side doesn't show the right numbers. For example the 24 kHz sampling shows 10.5 as the highest. And 8 kHz shows 3.5 as the highest. Should be closer to 21 and 7 respectively.

Useful This has helped me identify mysterious noises by combining the frequency measurements with some online research. It has also proven that there really are noises that only I can hear, and I'm not nuts.

Great app I will give a star for each point implemented: 1. Subtracting of pre recorded spectrum(e.g. noise) 2. Lower sampling frequencies(e.g. 4kHz, 2kHz) 3. Saving of spectrogram in text Or higher resolution image with time marks Other than that this app is much more accurate than tons of others I tested.

Free version is just as good. I loved the free version, but the pro version is not worth what I paid, and there is no refund. If it had more options for LOWERING the sample frequency not just raising it, I would give it four or five starts. Not enough options to make it worth the money. Stick with the free version.

Useful technical app I use this program on my phone often to analyze sounds and visualize sounds that are below audibility. Consistently works great! Now I have started using it on my tablet. Never any problems.

Needs to go lower I bought this intending to use it to detect feedback frequencies while mixing monitors. It seems accurate, but will not detect anything under 1k, which makes it useless for low frequency feedback. Will give 5 star when this is addressed.

Is there a developer in the house? For what this app is, the standard bearing app of its kind, it needs some very basic work. More scaling options? Faster scrolling, I.e. wider spectrograms - just literally stretched out would be great.

Unfinished feel. Great idea mediocre implementation. Set an option you phone doesn't support and it'll not work... Restart the program before changing it back and you get an "unsupported configuration" error and an instant quit, making it then unusable.

Similar

New version! Professional-grade FFT / Spectrum Analyzer, tested and in use all around the world by live sound engineers, scientists, mechanics, and hobbyists!

Thank you everyone for making this the top spectrum analyser application on the market. I am dedicated to making this app work well for you! Risk-free purchase; I will refund your money (even beyond Google's 15 min window) if the app does not work for you.

If you have ANY problems with this release, or requests - email dev@electronchaos.com. I *will* respond, and work towards fixing your issue. And if I can't fix it, I will give you a full refund.

The screenshots show some of the dynamic zooming capabilities, and the linear vs logarithmic modes. The first screenshot shows the analyser in linear mode, while the next shows logarithmic. The screenshots show the mic on the OG Droid phone capturing a test tone at 21kHz, in addition to other frequencies. Nice real-time analyzer!

The last two screenshots show a zoomed in signal at the lower frequency range - same signal sample (paused again), with two different windows applied.

I am honoured and humbled by each and every purchase made; thank you!

Email for contact is dev@electronchaos.com

Thank you everyone for purchasing - the response has been great! I appreciate all the encouraging emails.

Purchases are risk free - I offer refunds past the 15-minute window if it does not work on your hardware for some reason.

H/W Updates across all versions:All reported hardware issues have been resolved - these are listed below for documentation:

Fix for Toshiba Thrive, and Dell Streak mic input issue.

Fix for Samsung Captivate (Galaxy S SGH)! Thanks for the report Red Baron - if this update fixes your problem, I would appreciate an update to your review.

My goal is to make a useful spectrum / spectral analyser tool for audio professionals, engineers, installers, etc. Signal processing is useful in many fields, from microphone analysis to RTA, to engineering / technical fields. Let me know how you use it! I find it fascinating the different uses.

Here are the permissions the app requests, and why:

* android.permission.RECORD_AUDIOTo capture audio from the Microphone to display

* android.permission.WRITE_EXTERNAL_STORAGESave the graph to an image, and send it via email.

*****IMPORTANT: it shows spectrum only for internally played music but not for FM radio or mic, if you have any problems, email me.Some devices or music players may have problems (really not all), so try free version first.*****

Make from your phone or tablet a spectrum analyzer for your music.

It show frequency spectrum of music played from your favorite music player running in the background.

Frequency spectrum is shown in logarithmic scale on X approximately from 43Hz to 22kHz and on Y from 0 to -50dB.

A fast real-time 3D spectrogram waterfall displaying different FFT spectrum in succession, which give the representation of how the spectrum changes frequency over time. This tool is useful for engineers analyzing spectral behavior.

*New update*Increased the FFT size to 44100 samples. Now it's more accurate than ever! Every frequencies can now be detected.

This App inherit many of the same features from our audio signal processing App series.

1. Two graphical displays: 3D Waterfall and 2D spectral graph2. Fast and accurate: Tested on Droid X with max sample rate of 48kHz with FFT size of 44100, which equates to 1.0 Hz per bin.3. Zoom in and out capabilities for high data resolutions.4. Abilities to save and playback recorded data to and from file.5. Able to transmit recording data over TCP.6. Five well know Matlab colormaps to choose from.7. Eight standard windowing functions. 8. Abilities to save settings to avoid redundancy upon next start up.

*Hardware permission*

1. WRITE_SETTINGS - This is needed to change the display from sleeping.2. RECORD_AUDIO - Data taken from microphone.3. INTERNET - This is required for transmitting audio data over a socket.4. WRITE_EXTERNAL_STORAGE - Save recorded audio data to SD for playback.

*NOTE to customers*Please informed us (idroidbot@gmail.com) if you have any issues running the App on your phone or you are not completely satisfied. We can issue you a refund. Thanks, VT

If you like this app, checkout our other apps: Acoustics Filter, iSpectral, iGram, FastGram and ActivePinger.

*Hardware Note*Since each phone has different hardware, you may need to increase or decrease your sample rate or FFT size setting to get optimal response.

**** Mini Manual ****1. Zoom In/Out

The app starts displaying data as soon as you launch it. To zoom in and out, make sure to press the button starting with "Zm" to "Zm On". Once this is selected start dragging the touch screen and release to zooming in. Press the "Back" button to zoom out.

2. To see readout of cursor, make sure to press the "Bar" button to "Bar On" and start touching the screen.

Audio spectrum analyser for Android! Very precise diagramshowing the spectrum of the audio signal near the phone. You can see the visualization of your voice or music. Additionally it will display frequency of the loudest signal.Can be used to test your instruments, check your football whistle frequency, andeven tune your piano, guitar or other string instrument."

Features real-time smooth high framerate spectrum diagram! Frequencies between 20Hz and 20kHz!Scale is logaritmic, what is best for human perception.Software is using FFT internally.

This application is using advertisement, but it will not create icon or bookmarks on the desktop. We are also not using any push advertisement.

SPLMeter shows SPL (deciBels) of the Android's mic signals, and their frequency spectrum. The meter has three speeds: Fast, Medium and Slow. Shows peak envelope and frequency of maximum intensity, and clipping. ISO 1/3 Octave bars and Spectrogram.

(If you need a more fully featured RTA, with 1/1, 1/3 and 1/6 octave display, RT60, Noise Criteria, A&C Weighting etc. combined with a signal generator, please take a look at my "AudioTool" app in Android Market.)

Spectrum Analyze gives you real-time spectrum data from the audio data. A great way to analyze sound from you Android device.

Features in Free Version* No Ads* 44100 Hz sampling rate * 8192 samples per spectrum * ~5.4 Hz Resolution per point* Peak Detect of whole spectrum and your local window* Pinch to Zoom* Tap to Pause* Max Hold* Take Screenshot* Share on Facebook, Gmail and many more

Features in Premium Version. * Limited time 99 cent app! Will increase price as more features are added.* Help out the developer to keep adding more features!* Beta Log Frequency Scale* Adjustable sample rate from 8000 Hz to 48000 Hz* Adjustable Size of FFT up to 100000 samples* Not limited on Power of 2 sized FFTs (Must be even though)* Autoscale* Adjustable Manual Scale

Analyze sound you hear with your smartphone or tablet. See sound content in time and frequency in identify leading frequencies. With this tool you can analyze any sound you wish (playing instrument, singing, whistle, car engine, animal sounds, etc...)

You can display all panels at once (default screen). If you want to see each panel at full-screen, you can simply click on panel and it will be shown full-screen with additional settings that can be changed by pressing buttons. Display can also be paused to take screenshots.

In Spectrum panel values of one or five leading frequencies can also be displayed. Linear or Logarithmic magnitude scale can be chosen. For better peak frequency estimation, special algorithm is applied.

Please share your experience with us. We will do our best to make this application better.

Thank you for all the support. Specscope is now free! I hope everyone enjoys it! Checkout NFX Oscilloscope

SpecScope is a spectrum analyzer and is the second in the line of engineer applications from NFX Development. The SpecScope incorporates the speed and ease of use to access FFT frequency measurements in a hurry.

The UI maximizes the size of the screen, using gesture control to navigate around the graph measurement.

If you are unhappy in anyway with this product, feel free to contact me and I will help all I can, if I cannot help I will offer a refund at any time (even past the 15 minute google refund mark)

Email : nfxdevelopment@gmail.com

- Logarithmic/Linear measurements- Pinch to zoom in both X and Y axis- Simply navigate round the graph by dragging- Selectable No. bin for accuracy versus speed- Three settings of spectrum averaging- Four different windowing options- Threshold trigger to hold the peak value- Tap to pause and resume measurements (graph is still navigational in this mode)- A adjustable sample rate allow analysis from 10 Hz to 22KHz- Optional measurement markers for ease of reading

Thank you for purchasing, I hope you enjoy! If you have enjoyed this app leave a quick rating and comment. Thanks!!

Since v.1.0.7, you can choose FFT window size either 1024 or 2048. A higher window size gives more accurate frequencies but using a small window size is faster and recommended on low spec phone. You can choose two histogram plotting styles (area plot or bar graph) and see dominant frequency from the graph.

Exclusive ISO 1/3 Octave Calibration - correct for your phone's microphone response. Octave calibration discs are moved up or down to obtain a flat response, and match the overall SPL to that of an external meter. Save/Restore of Cal files (Dayton Audio iMM-6 also supported).

Use: home theater, audio engineer, car audio, etc

AudioTool FFTs sets of samples recorded at the microphone. Aliasing reduced by Hann windowing. SPL calculated in realtime. Spectra may be saved as files on the SD card, then loaded and displayed with the live spectrum. The "Store" button stores the current live spectrum - "Load" shows a list of stored spectra to select.

To hide the buttons, tap the screen. To restore them, tap again. To zoom the scale, pinch the screen. To move the scale, drag it up or down (left or right).

The deciBel meter uses IIR filters and exponential averaging to calculate Flat, A and C weighted response at speeds of Fast, Medium and Slow speeds.

A pair of cursors can be shown on the RTA and Chart Recorder displays: each can be moved to any position, and will display the SPL & time/frequency values there. Initially, both cursors are positioned mid-screen - simply drag them to a new position with the fingertip. The cursors can be turned on and off in the Menu.

The loudspeaker polarity checker can be used to check whether a loudspeaker is wired in phase: connect the AudioTool output to the speaker under test, select "Polarity" from the signal generator screen, then return to the RTA screen. If the speaker is out of phase (polarity reversed) AudioTool will show "Pol ---", otherwise "Pol +++" if the speaker is in phase.

The Noise Criteria (available from the Menu) function shows a set of NC contours overlaid on the 1/1 Octave RTA display and the calculated real time current NC value is also shown.

The Chart Recorder shows a moving trace of the SPL measurements over the last few minutes.

RT60 measurements can be made by starting the RT60 component using the "RT60" button, and then using a loud clap (or similar) to trigger the measurement. RT60 can also be used with Pink Noise from the AudioTool generator. RT60 times measure how much reverberation or echo there is in a room or auditorium.

The frequency accuracy of the generated periodic signals is typically around 1%. Sine wave fidelity is good throughout most of the audio range. Other signals' leading and trailing edges show ringing and decreasing frequency response artifacts in the upper ranges, depending on the Android used.

Please consult the online manual for complete descriptions of the AudioTool features:https://sites.google.com/site/bofinit/audiotool

Professional version of the RTA audio analyser. Adds 1/4, 1/6 and 1/12 analysation band spacing with up to 120 bands, scalable peak holds and more colour schemes. Permanently stores calibration data. Screenshots can be saved and peak / rms values can be exported to a .csv file.

Change your voice in real-time after recording -- this voice processor makes your voice sound like a robot, an alien, a baby and many more. Put yourself in a pipe, in a bathroom, a hall or a station. Speed your voice up, slow it down or alter it's pitch.

A virtual unlimited combination of effects and rooms give you free control over the sound of your voice message. 3D processing adds space when listened in stereo (e.g., headset).

This version allows real-time playback and set-up of all parameter. For saving, ring- notification- and alarm-tone functionality see the pro version of VoiceProcessor.

Live wallpaper that displays live audio data as a spectrogram or waveform on the home screen. For additional options also check our pro-version, that allows to change colour, size, update speed and more.

Change your voice in real-time after recording -- this voice processor makes your voice sound like a robot, an alien, a baby and many more. Put yourself in a pipe, in a bathroom, a hall or a station. Speed your voice up, slow it down or alter it's pitch.

A virtual unlimited combination of effects and rooms give you free control over the sound of your voice message. 3D processing adds space when listened in stereo (e.g., headset).

This version allows real-time playback and set-up of all parameter. For saving, ring- notification- and alarm-tone functionality see the pro version of VoiceProcessor.

Record voice messages, alienate them and store selections on sd-card or set them as ring-tone, notification or alarm.

Five basic effects along with four room types can be combined to a virtual unlimited number of effect combinations. The speed, the pitch and the room size can be set up individually giving the user a professional voice processing tool on your hand set.

Boxed Balls simulates balls rolling on your home screen. The free version implements gravity and two different colours and ball sizes. For more functions consider buying Boxed Balls Pro with many more features and options like backgrounds, repulsion and haptic feedback.

TrakMe allows you to build your own tracking server application. Tracking data like position, speed and altitude is sent in real time to a server, where others can view it after entering your unique phone ID.

This is the pro version of Boxed Balls. It simulates rolling balls on your home screen and implements realistic collision, gravity and repulsion. Different backgrounds and optional haptic feedback allows even more realistic look and feel.